Digital Data

Question 1

What is Data?

Answer 1

Raw facts and figures

Question 2

What is information?

Answer 2

processed Data

Question 3

In What format does the computer store data?

Answer 3

Binary Format

Question 4

1 nibble = ?

Answer 4

4 bits

Question 5

1 byte = ?

Answer 5

8 bits

Question 6

1 kilobyte= ?

Answer 6

1024 bytes

Question 7

1 megabyte= ?

Answer 7

1024 kilobytes

Question 8

1024 megabytes=?

Answer 8

1 Gigabyte

Question 9

1024 Gigabytes=?

Answer 9

1 Terabyte

Question 10

Explain Datatype numeric

Answer 10

No decimal

+/-

Question 11

What is a pixel?

Answer 11

A smallest unit of a digital image that can be displayed

Question 12

What is Image resolution

Answer 12

Represents the quality of an image
More pixels = higher quality

Question 13

What is a Bitmap Image?

Answer 13

Made up of Pixels

Stores details about every pixel on the image

Question 14

Advantage of Bitmap

Answer 14

Can be compressed which reduces file size

Question 15

Disadvantage of Bitmap

Answer 15

Storing every pixel means that file size is large

Question 16

What is a vector image?

Answer 16

stores information about the components that make up a image

Question 17

What is Streaming?

Answer 17

Streaming allows a video to be viewed on a website without needed to download it

Question 18

What is Buffer?

Answer 18

When the user if watching a part of a video, a buffer is used to download the next part of the video

Question 19

What is sample rate?

Answer 19

Number of audio sample captured per second to represent the sounds digitally

Question 20

What is Bit depth?

Answer 20

The number of bits used for each sound sample

Question 21

Explain Analogue to Digital Conversion

Answer 21

An analogue signal represents a physical quantity
An analogue to digital converter will sample a signal at regular time intervals

Question 22

What is Data Portability

Answer 22

The ability to transfer data from one computer to another

Question 23

Expand JPEG

Answer 23

Joint Photographic Expert Group

Question 24

Expand TIFF

Answer 24

Tagged Image File Format

Question 25

Expand PNG

Answer 25

Portable Network Graphics

Question 26

Expand GIF

Answer 26

Graphic Interchange Format

Question 27

Expand CSV

Answer 27

Comma -separated-value

Question 28

Expand RTF

Answer 28

Rich Text Format

Question 29

Expand MIDI

Answer 29

Musical Instrument Digital Interface

Question 30

Expand MPEG

Answer 30

Moving Picture Experts Group

Question 31

Expand AVI

Answer 31

Audio Video Intervealed

Question 32

Expand PDF

Answer 32

Portable Document Format

Question 33

Expand WAV

skibidi

Answer 33

Waveform Audio File

Question 34

Expand WMA

Answer 34

Windows Media Audio

Question 35

Explain Data Compression

Answer 35

is used to reduce file size making it easier to store

Question 36

Explain Lossy Compression

Answer 36

Reduces file size by removing some data and therefore decreasing the resolution

Question 37

Explain Lossless Compression

Answer 37

reduces file size while mantaining quality of data